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Wisconsin dad Daniel Medina was so proud when his sons asked him to stop the car so they could help a man in a wheelchair shovel snow that he had to snap a photo.

Now that picture, and their story, has gone viral, with many people applauding the father for good parenting, and his children for their kind act.

Medina and his sons, who live in Milwaukee, had just left the mall on Sunday when they spotted the man, whom they didn't know, shoveling snow from his wheelchair, he told TODAY.

"I didn't even see the guy because I was concentrating on driving in the snow," Medina said. "My oldest, Daniel, said, 'Pull over, let's go help him.' So I said, 'OK, let's go.' We pulled up next to him, and Daniel asked if he had any extra shovels."

Sure enough, he did. Medina and his sons, ages 6 and 10, stayed for about 45 minutes shoveling the corner lot, he said.

You're never too young for kindness! Daniel Medina's sons Daniel, 10, and Dominic, 6, recently volunteered to help a man in a wheelchair shovel snow. Courtesy of Daniel Medina

“He was grateful,” he said of the man they helped. “He kept telling us thanks and kind of supervised us, made sure we dug out the bus stop in the corner, and also his car because he had a doctor’s appointment the next day.”

“You know what’s funny? I couldn’t get the kids to help me at home,” Medina said with a laugh. “I said, hey kids, want to shovel? And they said, 'No, Dad, it’s pretty late. We have to shower and get ready for school.'”